ASSESSMENT OF THE GENETIC RELATEDNESS OF BARLEY ACCESSIONS (HORDEUM-VULGARE SL) RESISTANT TO SOIL-BORNE MOSAIC-INDUCING VIRUSES (BAMMV, BAYMV, BAYMV-2) USING RAPDS

Thirty-six Hordeum vulgare varieties and 12 H. spontaneum germplasms o riginating from different parts of the world and showing different rea ctions to the barley yellow mosaic virus complex (BaMMV, BaYMV, BaYMV- 2) were analyzed for genetic similarity using RAPDs. On the basis of a n analysis of 20 selected RAPD-primers corresponding to 544 bands gene tic similarity according to-Nei and Li (1979) was estimated to be betw een 0.685 and 0.964. Associations between the 48 genotypes were calcul ated using UPGMA-clustering and principal coordinate analysis. By appl ying these methods we were able to separate H. spontaneum accessions f rom H. vulgare varieties, and within these groups all the genotypes we re clustered correctly according to their origin. Consequently, RAPD a nalysis can be considered a very useful and efficient tool for the fas t estimation of genetic relationships in barley. The correlation betwe en genetic similarity with respect to German varieties and adaptation of exotic barley varieties to German growing conditions is discussed.